Edwards, C. A. (2004). Earthworm ecology (2nd. ed.). CRC Press.
Chicago Style aipamenaEdwards, Clive A. Earthworm Ecology. 2nd. ed. Boca Raton: CRC Press, 2004.
MLA aipamenaEdwards, Clive A. Earthworm Ecology. 2nd. ed. CRC Press, 2004.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.